Vestil HDC-450 - Manual (Page 6)

6
AIR BLEED PROCEDURE
If your unit descends very slowly or will not descend at all, air could be trapped in the hydraulic
circuit and must be "bled" from the system. The Hydraulic Drum Stacker (HDC-450 Series) utilizes a
"bleeder" fitting at the end of the cylinder near the cross tube. If you experience the above, follow
these directions.
1.) Remove the drum from the cradle.
2.) Raise the unit.
3.) If available, place a 1/4" plastic hose over the cylinder bleeder screw.
4.) Loosen the bleeder screw at the top of the cylinder approximately 1/4 to 1/2 turn to allow
trapped air to escape.
5.) When the cylinder is free of air, tighten the bleeder screw and remove the plastic hose.
Air can also become trapped in the foot pump.
Please refer to page 8 for the foot pump air bleed procedure.
HYDRAULIC SCHEMATIC
1.5" x 18" DISPLACEMENT CYLINDER
WITH INTERNAL VELOCITY FUSE